著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Schmüdgen, Konrad",On domains of powers of closed symmetric operators,,"Aarhus universitet, Matematisk institut",1981,Preprint series,,,,https://cir.nii.ac.jp/crid/1130000796021734784